Sikafloor®-156
2-Part Epoxy primer, levelling mortar and mortar screed
Sikafloor®-156 is a 2-part, low viscosity, multipurpose, epoxy resin which can be used as an epoxy primer, levelling mortar and mortar screed. Internal and external use.
- Low viscosity
- Good penetration ability
- High bond strength
- Solvent free
- Easy application
- Short waiting times
- Multi-purpose
- For external use also
Usage
- Priming concrete substrates, cement screeds and epoxy mortars
- For normal to strongly absorbent substrates
- Primer for all Sika Epoxy and PUR floorings
- Binder for levelling mortars and mortar screeds
- For internal and external use
Advantages
- Low viscosity
- Good penetration ability
- High bond strength
- Solvent free
- Easy application
- Short waiting times
- Multi-purpose
- For external use also
Packaging
| Part A | 15 kg, containers |
| Part B | 5 kg containers |
| Part A+B | 20 kg ready to mix unit |
Colour
| Part A | transparent, liquid |
| Part B | brownish, liquid |
Product Details
APPROVALS / CERTIFICATES
- Meets to GB/T 22374-2018
Composition
Epoxy resin
Shelf life
24 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C.
Density
| Part A | ~1,10 kg /l |
| Part B | ~1,02 kg /l |
| Mixed resin | ~1,10 kg /l |
All density values at 23 °C.
Solid content by mass
~100 %
Solid content by volume
~100 %
Shore D Hardness
| ~83 (7 days / +23 °C / 50 % r.h.) | (GB/T 22374-2018) |
Abrasion resistance
| < 0.03 g | (GB/T 22374-2018) |
Resistance to impact
| Heavy duty | (GB/T 22374-2018) |
Compressive strength
| Mortar: ≥ 45 MPa (30 days / +23 °C / 50 % r.h.) | (GB/T 22374-2018) |
Tensile adhesion strength
| ≥ 2 MPa (failure in concrete) | (GB/T 22374-2018) |
Coefficient of friction
| > 0.5 (Dry friction coefficient) |
Chemical resistance
Resistant to many chemicals. Contact Sika technical service for specific information.
Application
Mixing ratio
Part A : Part B = 75 : 25 (by weight)
Ambient air temperature
+10 °C min. / +30 °C max.
Relative air humidity
80 % max.
Dew point
Beware of condensation.
The substrate and uncured applied floor material must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the floor finish. Low temperatures and high humidity conditions increase the probability of blooming.
Substrate temperature
+10 °C min. / +30 °C max.
Substrate moisture content
≤ 4 % pbw moisture content.
Test method: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
| Temperature | Time |
| +10 °C | ~60 minutes |
| +20 °C | ~30 minutes |
| +30 °C | ~15 minutes |
Curing time
Before applying non-solvent based products on Sikafloor®-156 allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 24 hours | 4 days |
| +20 °C | 12 hours | 2 days |
| +30 °C | 8 hours | 24 hours |
Before applying solvent based products on Sikafloor®-156 allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 36 hours | 6 days |
| +20 °C | 24 hours | 4 days |
| +30 °C | 12 hours | 2 days |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Applied product ready for use
| Temperature | Foot traffic | Light traffic | Full cure |
| +10 °C | ~ 24 hours | ~ 5 days | ~ 10 days |
| +20 °C | ~ 12 hours | ~ 3 days | ~ 7 days |
| +30 °C | ~ 6 hours | ~ 2 days | ~ 5 days |
Note: Times are approximate and will be effected by changing ambient conditions.
Consumption
| Coating System | Product | Consumption |
| Priming | 1–2 × Sikafloor®-156 | 1–2 × 0,30–0,50 kg/m² |
| Levelling mortar fine (surface roughness < 1 mm) | 1 pbw Sikafloor®-156 + 0,5 pbw quartz sand (0,1–0,3 mm) + 0,015 pbw Extender T | 1,4 kg/m²/mm |
| Levelling mortar medium (surface roughness up to 2 mm) | 1 pbw Sikafloor®-156 + 1 pbw quartz sand (0,1–0.,3 mm) + 0,015 pbw Extender T | 1,6 kg/m²/mm |
| Bonding bridge | 1–2 × Sikafloor®-156 | 1–2 × 0,3–0,5 kg/m² |
| Epoxy screed / Repair Mortar (15–20 mm layer thickness ) | 1 pbw Sikafloor®-156 + 10 pbw quartz sand | 2,2 kg/m²/mm |
These figures are theoretical and do not allow for any additional material required due to surface porosity, surface profile, variations in level or wastage etc.
EQUIPMENT
Mixing
- Single paddle electric stirrer (300-400 rpm).
- Double paddle electric stirrer (300-400 rpm).
- Forced action mixer or rotating pan, paddle or trough type (300-400 rpm). Free fall mixers must not be used.
- Scraper
- Clean mixing containers
Application
- Spiked roller
- Trowel
- Mixed material carrier
- Fleece roller
MIXING
Prior to mixing all parts, mix separately part A (resin) using a low speed single paddle electric stirrer (300 - 400 rpm). Add part B (hardener) to part A and mix part A + B continuously for 3,0 minutes until a uniform mix has been achieved. When parts A and B have been mixed. Using a double paddle (axis) electric stirrer (>700W), pan type revolving or forced action mixer or other suitable equipment (free fall mixers must not be used). Gradually add the appropriate granulometry of dried quartz sand and if required Extender T. Mix for a further 2,0 minutes until a uniform mix has been achieved. To ensure thorough mixing pour materials into another container and mix again to achieve a smooth consistent mix. Excessive mixing must be avoided to minimise air entrainment. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing. Mix full units only. Mixing time for A+B+quartz sand = 5,0 minutes.
APPLICATION
Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures. If moisture content > 4% parts by weight, Sikafloor® EpoCem® may be applied as a Temporary Moisture Barrier (T.M.B.) system.
Primer
Pour mixed Sikafloor®-156 onto the prepared substrate and apply by brush, roller or squeegee then back roller in two directions at right angles to each other. Ensure a continuous, pore free coat covers the substrate. If necessary, apply two priming coats.
Confirm primer waiting /overcoating time has been achieved before applying subsequent products. Refer to individual primer Product Data Sheet.
Levelling mortar
Apply the levelling mortar by squeegee/trowel to the required thickness.
Bonding bridge
Pour mixed Sikafloor®-156 onto the prepared substrate and apply by brush, roller or squeegee. For epoxy screed, back roller in two directions at right angles to each other. Ensure a continuous, pore free coat covers the substrate. If necessary, apply two priming coats.
Epoxy screed / repair mortar
Apply the repair or screed mortar onto the “tacky” bonding bridge. For the screed, use levelling battens and screed rails as necessary. After a short waiting time, compact and smoothen the mortar with a trowel. For the screed, a teflon coated power float (~20 - 90 rpm) is recommended.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Thinner C immediately after use. Hardened material can only be removed mechanically.
CLEANING
To maintain the apperance of the floor after application, Sikafloor®-156 must have all spillages removed immediately and be regularly cleaned using rotary brush, machanical scrubbers, scrubber dryer, high pressure washer, wash and vacuum techniques etc., using suitable detergents and waxes.